Being good at aikido as a beginner doesn't mean you will be in that state forever. You will go through different stages when you advance and most likely you will also struggle. You will also experience plateaus and heartaches. Aikido is not about learning techniques per se or just good body coordination, it is something much greater. Techniques are only tools to give you an insight to what aikido really is.
I remember at 5th kyu I thought I knew Aikido. Now at 3rd Kyu I realize I don't. But I can learn.